The McCormick 258511R91 is a genuine OEM oil pan gasket designed for various McCormick Farmall and International Harvester tractor models. This essential component ensures a tight seal for the engine's oil pan, preventing leaks and maintaining optimal engine lubrication. Compatible with models such as Farmall 450, 400, 350, 300, M, H, C, B, A, Super H, Super M, Super C, Super A, and IH 300, 350, 400, 450, H, M, O4, OS4, W4, W6, W9, WD6, WD9, WR9S, WR9, Super H, Super M, Super W4, Super W6, Super W9, Super WD6, Super WD9, Super WR9S, Super WR9.